Kinema film and like strip having feed perforations and mechanism cooperating with said perforations



Jan. 8 1924. r 1,480,514

W. C. JEAPES ET AL KINEMA FILM AND LIKE STRIP HAVING FEED PERFORATIONSAND MECHANISM CO6PERATING WITH SAID PERFORATIONS Filed June 6, 1922 2Sheets-Sheet 1 40 1: u D D 1,480,514 W. C. JEAPES ET AL KINEMA FILM ANDLIKE STRIP HAVING FEED PERFORATIONS AND MECHANISM Jan. 8 1924.

COPERATING WITH SAID PERFORATIONS 2 Sheets-Sheet .2

Filed June 6, 1922 lillr,

Patented Jan. 8, 1924.

UNITED STATES PATENT OFFICE.

WILLIAM CECIL JEAPEs, or BELMONT, ENGLAND, AND ANDRE LEON vlc'ronCLEMENT DEBBIE, or PARIS, FRANCE.

KINEMA FILM AND LIKE STRIP HAVING FEED PERFORATIONS AND OPERATING WITHSAID PERFORATIONS.

Application filed June a, 1922. Serial Nb. 5661408:

T 0 (IR whom it may concern:

Be it known that we. WILLIAM CECIL JEAPES, subject of the King ofEngland, residingcThe Drive. Belmont, Surrey, England, and Axons LiioxYicron CLMENT Dizisiuncitizen of the French Republic, *residing 111 RueSaint-Maur, Paris, France,

have themselvesinvented certain new and useful improvements in orrelating to kinema films and like strips having feed perforations andmechanism cooperating with said perforationsof which the following is aspecification.

This invention is for improvements in or relating to kinema films andlike strips having feed perforations, and to mechanism cooperating withsaid perforations. The invention is applicable to all mechanisms of thetype in which a perforated strip is fed by one or more movable vpin's orteeth which enter its. perforations and draw it along, and isparticularly applicable to automatically changing. according to thedensitv of the negative. the intensity of the art-ificial light used inkinema film pgint-ing. It will he understood. however, thattheinvent-ion is not limited in its scope to this particular use. It hasalready been proposed mechanisms of this kind in which a eeler memberrests in contact with the edge of the negative which is cut away afterdevelopment wherever along its length a change in its density occurs.This cutting away permits movement of the feeler which is utilizedelectrically to alter the intensity of the printing'light." If the edgesof the negatives were always perfectly-even when supplied by the makersthis mechanism,

would be perfectly satisfactory, but in practice joints in the films andotherunevennesses of their edges are present or develop and these aresometimes liable to cause undesired operation of the feeler and consequently undesired light changes. One of the objects of the presentinvention is therefore to avoid this difficulty. 1

.The primary feature of the present invention consists in the employmentof a strip which is wholly or partially blinded at the situation of oneor more appropriate feed perforations; said feed perforations areentered by pins or teeth carried by a movable device, which can be thefeeding member for the strip, so that those which should normally enterthe perforations at the blinded situations are caused to move bymncxANrsx cocontact with the strip at said situations,

said device being combined with controlling, regulating. or like means(such as 'means for changing the intensity of printing light) which areoperated by the movement of said movable pins. Thus it will be seen thatthe operation of the controlling, regulating or like means will be quiteindependentof any irregularities in the edge of the film. In one form ofcarrying out the invention one or more pins are resiliently mounted inthe strip feeding member so as to be movable along their longitudinalaxes, I

by contact with the strip, into sucha position as to become operativelyconnected to the said controlling, regulating, or like means.

The invention also provides a very con-.

venient construction of controlling, regulating or like means operableby the aforesaid strip feeding member.

For a more complete, understanding of the invention there will now bedescribed,

by way of example, only and with reference to the accompanying drawings,one constructional form of apparatus according to the invention. It isto be understood, however,

that the invention is not limited to the precise constructional detailsset forth. ,In these drawings:

Figure 1is an elevation of a portion of the mechanism,

Figure 2 is asection on the line 2 2 of Fig. 1 looking in the directionof the arrows a. a L Figure 3 is a section on the line 3-3 of igure 1looking in the direction of the arrows b. V,

And Figure 4 is a detail sectional view on a scale larger than that ofthe preceding figures.

Like reference numerals indicate like parts throughout the drawings.

In the drawings a kinema negative is indicated at 10 and a positive at11, the two being fed in synchronism past a lamp 12 for printingpurposes. The A films have the usual feed perforations 13 which areengaged by pins or teeth 14 on a feeding member 15. This feeding member.has a double movement in the well known manner, namely 55 rnent of thepart 25. The

ftowards and from the films and also vertically. .,The former movementoccurs with thestern lfiof the member sliding in the plate 17., whilethe latter movement occurs with'the members and 17 moving together inthe grooves 18. Tu this way an intermittent feed is imparted to thefilms each dwell occiuring with a picture opposite the lamp 12 in orderthat it may be printed 5. upon the positive 11.

, lln the construction shown, the member 15 has two projections 1%, onefor each set of perforations. These projections 14 are shown as beingformed integral with the member-15. lnaddition to these two pro- 19 isof such dimensions as to be able to;

enter the perforations 13 in a similar manner to that which theprojections 14 enter these perforations, and if desired this pin 19 mayduring part of the working of the apparatus assist the projections 14:to feed the films.

At intervals along the film 10, however, in-

dividual perforations 13 are blinded and the situation of the blindedperforations is so chosen that they will always come opposite to themovable pin 19 as they are engagedloy the member 15, and never comeopposite to the projections "14;. Thus, when such a blinded perforationcomes oppositeto the feeding member. 15 and the projections 14 enterperforations 13 in the films, the pin 19 wlll be prevented from enteringthe blinded perforation audits extension 23 will, therefore, projectfurther beyond the member 17 during the ensuing downward feeding Kmovement of the latter than would otherwise he the case. Pivotedadjacent the member 17 1s a lever in two parts 24 and 25 which arepivoted together at 26 and supported thereat upon a stationary part ofthe machine.

- ward movement of the part 24 and a light spring 28 prevents excessiveupward moveshape of the ad- Jacent faces of the parts 25 is such thatwhile the part 25 can be moved upwardly without moving the part 24:,downward movement of the part 25 will bring an abut- 11 ment upon itinto contact with the part 24: and thus move the latter upwards. Thenormal position of the parts 24: and 25 is 'shown in chain lines inFigure 1. on, however, the pin 19 is stopped from its 66 movementtowards the films with the feed A stop 2'? prevents excessive down-- ingmember 15 owing to the presence of a only one pin 19 in a set of pins ismade movable relatively to the feeding member 15 then naturally caremust be taken to ensure that an appropriate perforation is blinded, asobviously if some perforation is blinded which comes opposite one of theother pins in the set the desired results wlll not be obtained. All ofthe, pins in a set may be made movable relatively to the feeding member15 if desired, and it will be appreciated that at all times other thanwhen a blinded perforation is in question the movable pins may operatein quite the. ordinary way for feeding the strip alon Instead, however,of the pin or pins whic are movable relatively to the feeding memherbeing part of the ordinary set of feedln pins, they may be additional tosuch set an they need not necessarily take, part i the feeding operationof the strip.

Where the strip has to pass over toothed wheels other than the feedingmember aforesaid, one or more teeth in the wheel should be removed tocorrespond to the blinded perforations in the strip care being taken toensure that the blinded'perforations and the removed teeth coincide byarranging in a suitable numerical relationship the number of teeth onthe wheel and the number of perforations in the strip between theblinded ones.

The rod 29 operates the controlling, regulating or like means. This maytake many different forms. Tn the construction illustrated it consistsof means for changing the intensity of the rint-ing light, but it couldtake the form of means for controlling the speed at which a gramophonerecord is rotated or means for effecting the changeover from one recordto another in mechanism which has a kinema film and a gramophone recordrunning synchronously. These instances, however, are only given by wayof example as the invention has uses apart from kinema films.

Referring to the particular construction illustrated the rod 29 iscontrolled by a spring 32 which tends to move it downwards. At-its upperend the rod which is guided in a suitable bearing 33, bears against apivoted arm 34 carrying a spring- .controlled ratchet pawl 35. Thisengages a ratchet wheel 36 to turn the latter one toot-h each time therod 29 is lifted owing to a. blinded perforation 13 coming opposite tothe movable pin 19. 'The ratchet wheel 36 is mounted upon the shaft 37of a driving drum 38 for a perforated insulating strip 39. The strip 39has perforations l0, similar to those in a kinema strip, whereby it isdriven by the drum 38, and it also has other perforations 4:1. The'strip'39 is arranged to move between two opposed series of electricalcontacts 4:2 and 43 which are in co-opcrating pairs. the contacts ineach pair being adapted to engage each other and complete a circuit whena perforation -&1 in the strip 39 is brought between them. Convenientlythe contacts 42- are stationary and the contacts -13 movable and pressedby springs 44 towards the contacts -12. The perforations 41 areof suchdimensions and so placed that the contacts in one air at least arealways in engagement. he contacts are so wired in conjunction withresistances 45 that each (o-operating pair of contacts correspondslto adifferent current through the lamp 1:2. and since the circuits arearranged in parallel. the arrangement of the perforations -11. justdescribed will ensure that during operation of the device current willalwavs be flowing through the lamp 12. Sparliing at. the contacts willthereby be avoided which is of particular importance in kinema work.

In carrying out the invention as applied to the variation oftheintensity of the printing light for kinema films. the negative isfirst of all inspected and the places at which changes in the intensityof the light are necessary noted. Appropriate perforations 13 are thenblinded and a master strip 39 so perforated that the position of itsperforations 41. and theorder in which they occur. corresponds to thechanges in intensity of the printing light required.

It will appreciated that the invention providesnot only an improved,printing mechanism or other mechanism for handling or operating upon akinema. film or like strip having. feed perforations. but alsoimprovements in the films or other strips themselves. 1

The mechanisms whereby the -movable pins operate the means for changingthe in tensity of printing light. or for effecting some otherdesiredobject. may either mechanical or electrical as desired and maytake any suitable form according to circumstances. -Furthermore thefeeding member may take the form of a gate or comb for step-by-step feedascabove described or may take other forms as desired. Other modifications may also be made in the constructional details of theapparatus. a

What we claim is:

1. A sprip comprising a kinema having feed perforations, said stripbeing blinded at the location of appropriate feed perforations.

2. In apparatus handling a strip having feed perforations andparticularly in film printing apparatus. the combination of a stripwhich is blinded at the location of appropriate feed perforations. amovable member co-operating with said strip. pins carpropriate feedperforations. a movable feeding member for the strip. pins carried bysaid movable member and entering the feed perforations. means for movingsaid pins relatively to the feeding member bv'contact with the strip atthe blinded portions and operating means. actuated by the movement ofsaid pins for changing the intensity of printing light.

4. In apparatus handling a strip having feed perforations andparticularly in film printing apparatus. the combination of a stripwhich is blinded at the location of appropriate fee-d perforations. amovable feeding .member for the strip. pins carried by saidmovablemembe'r and enterin'gthe feed perforations. oneat least of saidpins being resiliently mounted in said..me mber. so as to be movablealong its longitudinal axis by contact with the strip at the blindedportions and operating means. actuated by the movement of said pins forchanging the intensity of printing light.

5. Apparatusfor handling a strip having feed perforations andparticularly film printing apparatus comprising. in combination. a stripwhich is blinded at the location of appropriate feed perforations. a

movable member cooperating with said strip. p1ns carried by said movablemember arid entering the feed perforations. means [for moving said pinsby contact with the member cooperating with said strip, pins carried bysaid movable member angtenteri ing the feed perforations, means formoving said pins by contact with the stripat '5 the blinded portions,two opposed series of electrical contacts arranged in cooperating pairs,and a perforated insulating strip driven by the movement of said pinsand arranged to move between said series of r tem era insuiatin% strianct so p e ment.

our signatures. e

WHLHAM CEQIHIL JEAPE&'

more tton titres cttnenr VDEBRHE:

In Witness whereof Webavehereunto set 15

